Temporal Description of Annual Temperature and Rainfall in the Bawku Area of Ghana

Asamoah, Yaw; Ansah-Mensah, Kow

doi:10.1155/2020/3402178

Cited by 22 publications

(17 citation statements)

References 31 publications

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“…This trend was only significant in May at 5%. These findings are in agreement with that of Asamoah and Ansah-Mensah [36], who found a rising trend in the rainfall in northern Ghana. These results also corroborate that of Ezin et al [39], who observed similar trends for rainfall in northern Benin.…”

Section: Serial Correlation Analysissupporting

confidence: 93%

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Rainfall and Temperature Trend Analysis by Mann–Kendall Test and Significance for Rainfed Cereal Yields in Northern Togo

Gadédjisso-Tossou¹,

Adjegan²,

Kablan³

2020

Sci

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This study investigates the trend in monthly and annual rainfall, minimum and maximum temperature (Tmin and Tmax) using the Mann–Kendall (MK) test and Sen’s slope (SS) method and evaluates the significance of their variability for maize, sorghum and millet yields in northern Togo employing multiple regression analysis. The historical data of Kara, Niamtougou, Mango and Dapaong weather stations from 1977 to 2012 were used. Four non-parametric methods—Alexandersson’s Standard Normal Homogeneity Test (SNHT), Buishand’s Range Test (BRT), Pettitt’s Test (PT) and Von Neumann’s Ratio Test (VNRT)—were applied to detect homogeneity in the data. For the data which were serially correlated, a modified version of the MK test (pre-whitening) was utilised. Results showed an increasing trend in the annual rainfall in all four locations. However, this trend was only significant at Dapaong (p < 0.1). There was an increasing trend in Tmax at Kara, Mango and Niamtougou, unlike Dapaong where Tmax revealed a significant decreasing trend (p < 0.01). Similarly, there was an increasing trend in Tmin at Kara, Mango and Dapaong, unlike Niamtougou where Tmin showed a non-significant decreasing trend (p > 0.05). Rainfall in Dapaong was found to have increased (7.79 mm/year) more than the other locations such as Kara (2.20 mm/year), Niamtougou (4.57 mm/year) and Mango (0.67 mm). Tmax increased by 0.13, 0.13 and 0.32 °C per decade at Kara, Niamtougou and Mango, respectively, and decreased by 0.20 per decade in Dapaong. Likewise, Tmin increased by 0.07, 0.20 and 0.02 °C per decade at Kara, Mango and Dapaong, respectively, and decreased by 0.01 °C per decade at Niamtougou. Results of multiple regression analysis revealed nonlinear yield responses to changes in rainfall and temperature. Rainfall and temperature variability affects rainfed cereal crops production, but the effects vary across crops. The temperature has a positive effect on maize yield in Kara, Niamtougou and Mango but a negative effect on sorghum in Niamtougou and millet in Dapaong, while rainfall has a negative effect on maize yield in Niamtougou and Dapaong and millet yield in Mango. In all locations, rainfall and temperature variability has a significant effect on the cereal crop yields. There is, therefore, a need to adopt some adaptation strategies for sustainable agricultural production in northern Togo.

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Section: Serial Correlation Analysissupporting

confidence: 93%

“…The long-term average temperatures were 27.4, 26.7, 28.9 and 28.1 • C in Kara, Niamtougou, Mango and Dapaong, respectively. These values are similar to the ones reported by Asamoah and Ansah-Mensah [36] in northern Ghana. Figure 3 represents the time series annual rainfall in northern Togo.…”

Section: Serial Correlation Analysissupporting

confidence: 91%

Rainfall and Temperature Trend Analysis by Mann–Kendall Test and Significance for Rainfed Cereal Yields in Northern Togo

Gadédjisso-Tossou¹,

Adjegan²,

Kablan³

2020

Sci

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“…The body temperature and body weight of two groups of nude mice were detected, and the changes of body temperature and body weight of the two groups of nude mice were recorded and compared before and after modeling, 1 week after modeling, 2 weeks after modeling, 3 weeks after modeling, and before sacrifice. The detection method of anal temperature referred to the research of Asamoah and Ansah-Mensah in 2020 [ 10 ]. Before testing, animals were allowed to empty their stools, and the anal temperature of all nude mice was recorded.…”

Section: Methodsmentioning

confidence: 99%

Analysis of Development Mechanism of Giant Cell Arteritis in Nude Mouse Model through Color Duplex Sonography and Computerized Tomography Nanocontrast Agent

Chen

Zhou

et al. 2021

BioMed Research International

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To explore the application value of color duplex sonography and enhanced computerized tomography (CT) inspection based on a nanocontrast agent in diagnosis and pathogenesis in giant cell arteritis (GCA), the GCA nude mouse model was constructed. In this study, 40 healthy male BalB/c nude mice aged 6-8 weeks were randomly divided into a control group (no model) and an experimental group (model), with 20 mice in each group, and the temporal artery tissue of GCA patients diagnosed as positive by temporal artery biopsy was implanted into nude mice to construct a GCA nude mouse model. Abdominal aortic biopsy and immunohistochemistry were used to verify the success of the GCA nude mouse model. All nude mice were subjected to color duplex sonography and enhanced CT examination based on a nanocontrast agent. At the same time, the basic indicators such as body weight, temperature, white blood cell (WBC), lymphocytes (LYM), hemoglobin (HGB), and platelet (PLT) were measured, and the protein expression levels of interleukin-6 (IL-6) and signal transducer and activator of transcription 3 (STAT3) were detected by immunohistochemistry. The results showed that the temporal artery wall of the nude mice in the experimental group thickened and the lumen was significantly narrowed, indicating that the cell arteritis model of nude mice was successfully constructed; ultrasound examination showed that the right superficial temporal artery vascular cavity narrowed, the blood flow signal changed like a filling defect around the periphery, and there was a low echo halo. CT examination showed that the left superficial temporal artery narrowed, and the inner diameter of the narrow segment of blood vessels changed like a bead. The body weight of nude mice in the experimental group decreased significantly after the modeling was completed ( P < 0.05 ); after modeling, the body temperature of the nude mice in the experimental group increased significantly ( P < 0.05 ); LYM and HGB values of nude mice in the experimental group were significantly lower than those in the control group ( P < 0.05 ); the content of IL-6, STAT3, IL-6, and STAT3 proteins in the arterial tissue of nude mice in the experimental group was lower than that of the control group ( P < 0.05 ), indicating that color duplex sonography and CT contrast agent technology can be used in the diagnosis and development mechanism research of GC.

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“…As a result, it is necessary for detailed statistical studies to be conducted with more emphasis on particular rainfall seasons. Aside from the rainfall trends and variations, many attempts have been made to understand different aspects of the climate system in Ghana which include the onset, cessation, and length of the rainfall seasons, rainfall and dry spell predictions, and temperature trend analysis [15][16][17][18][19]. Interestingly, the above studies have successfully explained the behaviors of temperatures, rainfall, dry spells at seasonal and sub-seasonal scales and their link to major meteorological parameters like seas surface temperatures (SST) and intertropical discontinuity.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Rainfall Variability over Southern Ghana

Braimah¹,

Asante²,

Ahiataku³

et al. 2021

Preprint

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Rainfall variability has resulted in extreme events like devastating floods and droughts which is the main cause of human vulnerability to precipitation in West Africa. Attempts have been made by previous studies to understand rainfall variability over Ghana but these have mostly focused on the major rainy season of April-July, leaving a gap in our understanding of the variability in the September-November season which is a very important aspect of the Ghanaian climate system. The current study seeks to close this knowledge gap by employing statistical tools to quantify variabilities in rainfall amounts, rain days, and extreme precipitation indices in the minor rainfall season over Ghana. We find extremely high variability in rainfall with a Coefficient of variation (CV) between 25.3% and 70.8%, and moderate to high variability in rain days (CV=14.0% - 48.8%). Rainfall amount was found to be higher over the middle sector (262.7 mm – 400.2 mm) but lowest over the east coast (125.2 mm – 181.8 mm). Analysis of the second rainfall season using the Mankandell Test presents a non-significant trend of rainfall amount and extreme indices (R10, R20, R99p, and R99p) for many places in southern Ghana. Rainfall Anomaly Indices show that the middle sector recorded above normal precipitation which is the opposite for areas in the transition zone. The result of this work provides a good understanding of rainfall in the minor rainfall season and may be used for planning purposes.

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Temporal Description of Annual Temperature and Rainfall in the Bawku Area of Ghana

Cited by 22 publications

References 31 publications

Rainfall and Temperature Trend Analysis by Mann–Kendall Test and Significance for Rainfed Cereal Yields in Northern Togo

Rainfall and Temperature Trend Analysis by Mann–Kendall Test and Significance for Rainfed Cereal Yields in Northern Togo

Analysis of Development Mechanism of Giant Cell Arteritis in Nude Mouse Model through Color Duplex Sonography and Computerized Tomography Nanocontrast Agent

Seasonal Rainfall Variability over Southern Ghana

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